Short answer: the Minirig 4. It ranks #7 of 177 medium speakers by sound quality, rated 4.3/5, at $229.95. The Harman Kardon Luna 2 ranks #25, rated 4.1/5, at $199.95, $30 cheaper, a saving that is not big enough to make up the sound-quality gap.
The Harman Kardon Luna 2 is the tougher option. A stylish waterproof speaker with clear, spacious mids, tight bass that stays clean at volume, and stereo pairing with a second unit. It is rated IP67 against Splash resistant for the Minirig 4. The catch: Treble can sound bright and edgy, and it loses more output off-axis than some rivals.
The Minirig 4 is the longer-running, lighter option. A small, long lasting speaker that gets loud and can add a matching subwoofer, with a 30 hour battery. It is rated for 30 hours of battery against 12 for the Harman Kardon Luna 2. At 1.2 lbs (550 g) it weighs noticeably less than the Harman Kardon Luna 2 at 1.6 lbs (735 g). It supports AAC Bluetooth, which the Harman Kardon Luna 2 lacks. The catch: Calls itself splash resistant and has no official water rating.
Buy the Minirig 4. It is rated higher for sound quality, and the $30 you would save on the Harman Kardon Luna 2 does not close the gap.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
A stylish waterproof speaker with clear, spacious mids, tight bass that stays clean at volume, and stereo pairing with a second unit.
A small, long lasting speaker that gets loud and can add a matching subwoofer, with a 30 hour battery.
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Specifications Side By Side
| Harman Kardon Luna 2 | Minirig 4 | |
|---|---|---|
| Price | $199.95 | $229.95 |
| Ranked | #25 of 177 in Medium Size Portable Bluetooth Speakers | #7 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | Yes |
| Battery Life | 12 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | AAC, SBC |
| EQ | Yes (4 presets + custom) | Yes |
| IP Rating | IP67 | Splash resistant |
| MicroSD Playback | No | - |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | No | Pointing up |
| TWS | Yes | Yes (Bluetooth or cable) |
| USB Playback | No | - |
| Weight | 1.6 lbs (735 g) | 1.2 lbs (550 g) |
| Bluetooth Version | 5.4 | 5.0 |
| Dimensions | 8.5” x 3.3” x 3.2” (216 x 84 x 81 mm) | 4” x 2.9” (101.6 x 73 mm) (diameter x height) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter | 70mm custom driver |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) | 60Hz - 18kHz (Manufacturer specified) |
| Amplifier Power | 40W (25W woofer + 15W tweeter) | 50W |
| Digital Aux Input | No | No |
| Strap | No | - |
| Aux Latency | - | 0ms |
| Bass Extension (-10dB) | - | 56Hz |
| Bluetooth Latency | - | 60ms |
| Maximum SPL | - | 106dB (measured by Alan Ross Reviews) |
| Power Bank | - | Yes (USB-C) |
| Built-in Microphone | - | Yes |
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